Not sure if they are constructed the same but I killed a bull moose with a ELD X 200gr centerfire bullet. I would not hesitate to use it and plan to if I ever draw a tag again. They are very accurate out of my Knight UL.
I've harvested several ELK with the Hornady 350 gr FBP in my Knight 50.cal MZ they go down hard and fast .The bullet looks fairly close to me . from the pictures I've seen.